package org;

public class example03 {public static void main(String[] args) {
    int i=20;
    long l=i;
    float f=l;
    double d=f;
    System.out.println("long类型变量l:"+1);
    System.out.println("float类型变量f:"+1);
    System.out.println("double类型变量d:"+1);
}
}
